Tell me all the versions of MSN chat which have been released so far by the Microsoft?

The MSN Chat is one of the services provided by the Microsoft in the Microsoft Network (MSN) branding. A total of 8 versions of this service was launched by Microsoft i.e. IRC 1 ,2, 3, 4, 5, 6, 7 and 8. But, this service was discontinued by Microsoft on 16th October, 2006.